Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c517ed5d4b95d37a0311c636b0690f0e0d790e1698036acbfdb5ee9529917e' 
  AND token = 'Ko1/bqGKV/9Nx5CKgkLB2UeIfrP/pwg5Cw+w7NKrOu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}